Recent Updates
Recently added Catalysts

TransCon IL-2 β/γ

Phase 1

Advanced Solid Tumor | Small molecule | Oncology |Ascendis Pharma A/S|Last Updated: Feb 24, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
CONTROLLEDBiomarker
Total Trials1
Total Enrollment320
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05081609A Study to Investigate Safety and Tolerability of TransCon IL-2 β/γ Alone or in Combination With Pembrolizumab and/or TransCon TLR7/8 Agonist or Other Anticancer Therapies in Adult Participants With Locally Advanced or Metastatic Solid Tumor MalignanciesPHASE1 ACTIVE NOT_RECRUITING 320Jan 11, 2022Aug 1, 2029Feb 24, 202668 United States, Australia +8
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Safety and Tolerability
Through study completion, expected average of 2 years

Treatment emergent and treatment related adverse events (assessed by NCI CTCAE v5.0), serious adverse events (SAEs), adverse events leading to treatment discontinuation, deaths.

Maximum Tolerated Dose (MTD)
Each cycle is 21 days

Determine the maximum tolerated dose by assessing the Incidence of Dose Limiting Toxicities (DLTs), treatment emergent and treatment related adverse events (assessed by NCI CTCAE v5.0), serious adverse events (SAEs), adverse events leading to treatment discontinuation and deaths.

Recommended Phase 2 Dose (RP2D)
12 months

To determine a recommended phase 2 dose of TransCon IL-2 β/γ and combination regimen for further development by evaluating number of patients with treatment-related adverse events as assessed by CTCAE.

Secondary Endpoints
Overall Response Rate
Average of 2 years
Pathologic Complete Response
15 weeks
Major Pathologic Response
15 weeks
Unlock Study Endpoints
Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part 1 Monotherapy Dose Escalation: TransCon IL-2 β/γEXPERIMENTALTransCon IL-2 β/γ in escalating doses to evaluate safety/tolerability and to determine the MTD and RP2D
Part 2 Combination Dose Escalation: TransCon IL-2 β/γ with PembrolizumabEXPERIMENTALTransCon IL-2 β/γ with Pembrolizumab in escalating doses to evaluate safety/tolerability and determine the MTD and RP2D
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ with SOC ChemoEXPERIMENTALTransCon IL-2 β/γ using the RP2D with SOC Chemotherapy to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ with TransCon TLR7/8 AgonistEXPERIMENTALTransCon IL-2 β/γ with TransCon TLR7/8 Agonist using the RP2D to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Monotherapy Dose Expansion: TransCon IL-2 β/γ followed by surgeryEXPERIMENTAL(Optional Arm): TransCon IL-2 β/γ using the RP2D followed by surgery to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ with Pembrolizumab followed by surgeryEXPERIMENTALTransCon IL-2 β/γ using the RP2D with Pembrolizumab followed by surgery to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose Expansion:TransCon IL-2 β/γ with TransCon TLR7/8 Agonist followed by surgeryEXPERIMENTALTransCon IL-2 β/γ with TransCon TLR7/8 Agonist using the RP2D followed by surgery to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose Expansion:TransCon IL-2 β/γ + Pembrolizumab + SOC Chemo followed by surgeryEXPERIMENTALTransCon IL-2 β/γ using the RP2D with Pembrolizumab and SOC Chemotherapy followed by surgery to evaluate safety/tolerability and anti-tumor activity of the combination
Part 3 Combination Dose ExpansionEXPERIMENTALTransCon IL-2 β/γ + Pembrolizumab TransCon IL-2 β/γ using the RP2D with Pembrolizumab
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ monotherapyEXPERIMENTALTransCon IL-2 β/γ monotherapy
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ + trastuzumabEXPERIMENTALTransCon IL-2 β/γ + trastuzumab
Part 3 Combination Dose Expansion: TransCon IL-2 β/γ + trastuzumab emtansine (T-DM1)EXPERIMENTALTransCon IL-2 β/γ + trastuzumab emtansine (T-DM1)
Part 4 Combination Dose OptimizationEXPERIMENTALTransCon IL-2 β/γ + Pembrolizumab TransCon IL-2 β/γ using the RP2D in titrating doses and/or different dose frequencies with Pembrolizumab
Interventions
NameTypeDescription
TransCon IL-2 β/γDRUGTransCon IL-2 β/γ will be administered as an intravenous (IV) infusion
PembrolizumabDRUGPembrolizumab will be administered as an intravenous (IV) infusion
Chemotherapy drugDRUGSOC chemotherapy will be administered as an intravenous (IV) infusion
TransCon TLR7/8 AgonistDRUGTransCon TLR7/8 Agonist will be administered as an IT (Intratumoral) injection
SurgeryPROCEDURESurgery will take place 4-6 weeks after last dose of study treatment.
TrastuzumabDRUGTrastuzumab will be administered as an intravenous (IV) infusion
Trastuzumab emtansine (T-DM1)DRUGTrastuzumab emtansine (T-DM1) will be administered as an intravenous (IV) infusion
Unlock Study Design Details
Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites68

Key Inclusion Criteria: * At least 18 years of age, or country defined local legal age * Demonstrated adequate organ function at screening * Life expectancy \>12 weeks as determined by the Investigator * Female and male participants of childbearing potential who are sexually active must agree to us...

Countries:United StatesAustraliaBelgiumCanadaItalyPolandSingaporeSouth KoreaSpainTaiwan
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT05081609primaryCompletionDate: changed
LOWMay 24, 2026NCT05081609studyFirstPostDate: changed